Things we learned from Day Two of the DNC

Mitt Romney faced a tsunami of attacks this summer over his business background and former private equity firm, Bain Capital. A pro-Obama super PAC particularly hammered Romney, spending $20 million on commercials in crucial swing states painting Romney as a greedy corporate raider.

And while speakers addressed Bain during prime time, Democrats seemed to be more fired up about another target Wednesday night: his running mate.

Fact or fiction? Paul Ryan's RNC speech

Speech after speech dealt several zings at Rep. Paul Ryan's budget plan, a proposal widely backed by the GOP and one that favors tax cuts coupled with large entitlement cuts.

Sister Simone Campbell especially hammered home the point. The nun has led other nuns on a nine-state bus tour this summer, campaigning against Ryan's plan as a measure that stands in the way of the church's moral teachings.

"Mitt Romney and Paul Ryan are correct when they say that each individual should be responsible. But their budget goes astray in not acknowledging that we are responsible not only for ourselves and our immediate families," she said. "Rather, our faith strongly affirms that we are all responsible for one another."

Her comments were carried further by U.S. Rep. Chris Van Hollen of Maryland, who serves on the same House Budget Committee chaired by Ryan. Van Hollen, who's been tapped to play the role of Ryan in debate prep for Vice President Joe Biden, said Romney and Ryan's "obsession with tax breaks for the wealthy is part of a rigid ideology."

"But this theory crashed in the real world. We all lived through the recession when jobs went down and the deficit went up," he said. "So when they say they'll turn around the economy, beware. They mean a U-turn back to this failed theory that lifted the yachts while other boats ran aground."

Wednesday night's program certainly highlighted Romney's time at Bain, especially when three laid-off workers took the stage to blast the GOP nominee as a heartless businessman motivated only by profit.

But a stronger theme threaded throughout the night could be found in Ryan's sweeping budget proposals and Democrats' fervent opposition to it.

Political observers say Romney's pick in Ryan was risky, given the congressman's highly polarizing policy proposals. Watching the convention this week, it seems those attacks fuel plenty of fire against Romney, one that may not die down anytime soon.